Acanthodii or acanthodians (whiles cried spiny shairks) is a paraphyletic cless o teleostome fish, sharin features wi baith banie fish an cartilaginous fish.[1]

Acanthodii
Temporal range: Early Silurian–Permian
Survival in modren Chondrichthyes
Acanthodes sp.
Scientific classification e
Kinrick: Animalia
Phylum: Chordata
Infraphylum: Gnathostomata
Cless: Acanthodii
Owen, 1846
Orders

Climatiiformes
Ischnacanthiformes
Acanthodiformes

  1. Zhu, Min; Yu, Xiaobo; Ahlberg, Per Erik; Choo, Brian; Lu, Jing; Qiao, Tuo; Qu, Qingming; Zhao, Wenjin; Jia, Liantao; Blom, Henning; Zhu, You’an (25 September 2013). "A Silurian placoderm with osteichthyan-like marginal jaw bones". Nature (in Inglis). 502 (7470): 188–193. doi:10.1038/nature12617. ISSN 1476-4687.